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/*
* Copyright © 2022 Michael Smith <mikesmiffy128@gmail.com>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED “AS IS” AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "../intdefs.h"
#include "../kv.h"
#include "../noreturn.h"
#include "../os.h"
#include "skiplist.h"
#include "vec.h"
#ifdef _WIN32
#define fS "S"
#else
#define fS "s"
#endif
static noreturn die(const char *s) {
fprintf(stderr, "mkentprops: %s\n", s);
exit(100);
}
struct prop {
const char *varname; /* the C global name */
const char *propname; /* the entity property name */
struct prop *next;
};
struct vec_prop VEC(struct prop *);
DECL_SKIPLIST(static, class, struct class, const char *, 4)
struct class {
const char *name; /* the entity class name */
struct vec_prop props;
struct skiplist_hdr_class hdr;
};
static inline int cmp_class(struct class *c, const char *s) {
return strcmp(c->name, s);
}
static inline struct skiplist_hdr_class *hdr_class(struct class *c) {
return &c->hdr;
}
DEF_SKIPLIST(static, class, cmp_class, hdr_class)
static struct skiplist_hdr_class classes = {0};
static int nclasses = 0;
struct parsestate {
const os_char *filename;
struct kv_parser *parser;
char *lastvar;
};
static noreturn badparse(struct parsestate *state, const char *e) {
fprintf(stderr, "mkentprops: %" fS ":%d:%d: parse error: %s",
state->filename, state->parser->line, state->parser->col, e);
exit(1);
}
static void kv_cb(enum kv_token type, const char *p, uint len, void *ctxt) {
struct parsestate *state = ctxt;
switch (type) {
case KV_IDENT: case KV_IDENT_QUOTED:
state->lastvar = malloc(len + 1);
if (!state->lastvar) die("couldn't allocate memory");
memcpy(state->lastvar, p, len); state->lastvar[len] = '\0';
break;
case KV_NEST_START: badparse(state, "unexpected nested block");
case KV_NEST_END: badparse(state, "unexpected closing brace");
case KV_VAL: case KV_VAL_QUOTED:;
struct prop *prop = malloc(sizeof(*prop));
if (!prop) die("couldn't allocate memory");
prop->varname = state->lastvar;
char *classname = malloc(len + 1);
if (!classname) die("couldn't allocate memory");
memcpy(classname, p, len); classname[len] = '\0';
char *propname = strchr(classname, '/');
if (!propname) {
badparse(state, "network name not in class/prop format");
}
*propname = '\0'; ++propname; // split!
prop->propname = propname;
struct class *class = skiplist_get_class(&classes, classname);
if (!class) {
class = malloc(sizeof(*class));
if (!class) die("couldn't allocate memory");
*class = (struct class){.name = classname};
skiplist_insert_class(&classes, classname, class);
++nclasses;
}
// (if class is already there just leak classname, no point freeing)
if (!vec_push(&class->props, prop)) die("couldn't append to array");
break;
case KV_COND_PREFIX: case KV_COND_SUFFIX:
badparse(state, "unexpected conditional");
}
}
static inline noreturn diewrite(void) { die("couldn't write to file"); }
#define _(x) \
if (fprintf(out, "%s\n", x) < 0) diewrite();
#define F(f, ...) \
if (fprintf(out, f "\n", __VA_ARGS__) < 0) diewrite();
#define H() \
_( "/* This file is autogenerated by src/build/mkentprops.c. DO NOT EDIT! */") \
_( "")
static void decls(FILE *out) {
for (struct class *c = classes.x[0]; c; c = c->hdr.x[0]) {
for (struct prop **pp = c->props.data;
pp - c->props.data < c->props.sz; ++pp) {
F( "extern bool has_%s;", (*pp)->varname)
F( "extern int %s;", (*pp)->varname)
}
}
}
static void defs(FILE *out) {
for (struct class *c = classes.x[0]; c; c = c->hdr.x[0]) {
for (struct prop **pp = c->props.data;
pp - c->props.data < c->props.sz; ++pp) {
F( "bool has_%s = false;", (*pp)->varname)
F( "int %s;", (*pp)->varname)
}
}
_( "")
_( "static void initentprops(struct ServerClass *class) {")
F( " for (int needclasses = %d; class; class = class->next) {", nclasses)
char *else1 = "";
for (struct class *c = classes.x[0]; c; c = c->hdr.x[0]) {
// TODO(opt): some sort of PHF or trie instead of chained strcmp, if we
// ever have more than a few classes/properties?
F( " %sif (!strcmp(class->name, \"%s\")) {", else1, c->name)
_( " struct SendTable *st = class->table;")
F( " int needprops = %d;", c->props.sz)
_( " for (struct SendProp *p = st->props;")
_( " mem_diff(p, st->props) < st->nprops * sz_SendProp;")
_( " p = mem_offset(p, sz_SendProp)) {")
_( " const char *varname = mem_loadptr(mem_offset(p, off_SP_varname));")
char *else2 = "";
for (struct prop **pp = c->props.data;
pp - c->props.data < c->props.sz; ++pp) {
F( " %sif (!strcmp(varname, \"%s\")) {", else2, (*pp)->propname)
F( " has_%s = true;", (*pp)->varname)
// from AM L4D2 SDK headers:
// > SENDPROP_VECTORELEM makes [offset] negative to start with so we
// > can detect that and set the SPROP_IS_VECTOR_ELEM flag.
// apparently if we're loaded via VDF, it hasn't been flipped back
// yet. just calling abs() on everything as an easy solution.
// TODO(opt): if we moved this into deferred init we wouldn't need
// to bother with this, but that might involve untangling more
// engineapi stuff
F( " %s = abs(*(int *)mem_offset(p, off_SP_offset));",
(*pp)->varname)
_( " if (!--needprops) break;")
_( " }")
else2 = "else ";
}
_( " }")
_( " if (!--needclasses) break;")
_( " }")
else1 = "else ";
}
_( " }")
_( "}")
}
int OS_MAIN(int argc, os_char *argv[]) {
for (++argv; *argv; ++argv) {
int fd = os_open(*argv, O_RDONLY);
if (fd == -1) die("couldn't open file");
struct kv_parser kv = {0};
struct parsestate state = {*argv, &kv};
char buf[1024];
int nread;
while (nread = read(fd, buf, sizeof(buf))) {
if (nread == -1) die("couldn't read file");
if (!kv_parser_feed(&kv, buf, nread, &kv_cb, &state)) goto ep;
}
if (!kv_parser_done(&kv)) {
ep: fprintf(stderr, "mkentprops: %" fS ":%d:%d: bad syntax: %s\n",
*argv, kv.line, kv.col, kv.errmsg);
exit(1);
}
close(fd);
}
FILE *out = fopen(".build/include/entprops.gen.h", "wb");
if (!out) die("couldn't open entprops.gen.h");
H();
decls(out);
out = fopen(".build/include/entpropsinit.gen.h", "wb");
if (!out) die("couldn't open entpropsinit.gen.h");
H();
defs(out);
return 0;
}
// vi: sw=4 ts=4 noet tw=80 cc=80
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